Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

How can I solve: CheckWarmupConvergence: Loads Initialization

asked 2020-01-23 10:23:37 -0600

thibaut_carrein's avatar

updated 2020-01-25 14:17:45 -0600

The simulation in open studio works but I get the same "severe" message for all my thermal zones. My building is large and contains a lot of thermal mass. During the simulation there was no internal load present and also no HVAC (with HVAC and with internal loads I get the same "severe" message).

Is this bad? And how can this be solved?

image description

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2020-01-23 10:52:16 -0600

updated 2020-01-23 10:54:49 -0600

If you're using the OpenStudio application, you can go to the Simulation Settings tab, expand Simulation Control, and increase the "Maximum Number Of Warmup Days" above the default of 25.

image description

If that doesn't help, there are also inputs for "Temperature Convergence Tolerance Value" and "Loads Convergence Tolerance Values" that could be changed as a fallback.

edit flag offensive delete link more


Thank you for the quick response. If I increase the value to 40, the problem is solved.

With how much can you raise it?

thibaut_carrein's avatar thibaut_carrein  ( 2020-01-23 11:25:21 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops


Question Tools

1 follower


Asked: 2020-01-23 10:23:37 -0600

Seen: 391 times

Last updated: Jan 23 '20